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/*
* Copyright (C) 2011, Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "ExceptionOr.h"
#include <memory>
#include <wtf/Forward.h>
#include <wtf/MessageQueue.h>
#include <wtf/RefPtr.h>
#include <wtf/Threading.h>
namespace JSC {
class ArrayBuffer;
}
namespace WebCore {
class AudioBuffer;
class AudioBufferCallback;
// AsyncAudioDecoder asynchronously decodes audio file data from an ArrayBuffer in a worker thread.
// Upon successful decoding, a completion callback will be invoked with the decoded PCM data in an AudioBuffer.
class AsyncAudioDecoder final {
WTF_MAKE_FAST_ALLOCATED;
WTF_MAKE_NONCOPYABLE(AsyncAudioDecoder);
public:
AsyncAudioDecoder();
~AsyncAudioDecoder();
// Must be called on the main thread.
void decodeAsync(Ref<JSC::ArrayBuffer>&& audioData, float sampleRate, Function<void(ExceptionOr<Ref<AudioBuffer>>&&)>&&);
private:
class DecodingTask {
WTF_MAKE_NONCOPYABLE(DecodingTask);
WTF_MAKE_FAST_ALLOCATED;
public:
DecodingTask(Ref<JSC::ArrayBuffer>&& audioData, float sampleRate, Function<void(ExceptionOr<Ref<AudioBuffer>>&&)>&& callback);
void decode();
private:
JSC::ArrayBuffer& audioData() { return m_audioData; }
float sampleRate() const { return m_sampleRate; }
Function<void(ExceptionOr<Ref<AudioBuffer>>&&)>& callback() { return m_callback; }
AudioBuffer* audioBuffer() { return m_audioBuffer.get(); }
void notifyComplete();
Ref<JSC::ArrayBuffer> m_audioData;
float m_sampleRate;
Function<void(ExceptionOr<Ref<AudioBuffer>>&&)> m_callback;
RefPtr<AudioBuffer> m_audioBuffer;
};
void runLoop();
RefPtr<Thread> m_thread;
Lock m_threadCreationMutex;
MessageQueue<DecodingTask> m_queue;
};
} // namespace WebCore
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